#ifndef _pnm_h_
#define _pnm_h_

/*
 clsquare - closed loop simulation system
 Copyright (c) 2008, Neuroinformatics Group, Prof. Dr. Martin Riedmiller,
 University of Osnabrueck
 
 Author: Sascha Lange
 
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are
 met:
 
 * Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in
   the documentation and/or other materials provided with the
   distribution.
 * Neither the name of the <ORGANIZATION> nor the names of its
   contributors may be used to endorse or promote products derived
   from this software without specific prior written permission.
 
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 DAMAGE. 
 */

#include <string>

/** writes a gray map to the specified file. Expects a double buffer 
 * of size width * height encoding the pixels of the image line by line.
 * Values have to be in the range [0,1]. Writes to a binary .pgm file.
 */
bool writeGrayMap(const std::string filename, const double* observation, int width, int height);

/** reads a gray map from the specified file. Expects a double buffer 
 * of at least size width * height to hold the pixels of the image.
 * Values will be in the range [0,1]. Is able to read from binary 
 * .pgm files. Puts the dimensions of the image in the parameters width
 * and height.
 */
bool readGrayMap(const std::string filename, double* image, int* width, int* height);


#endif
